Can any native speakers of Czech recommend how to say the following in Czech? It's nice to hear from you I look forward to hearing from you I hope that things are well with you How are things (going with you)? How is everything? Also, how do you informally sign off at the end of a letter in Czech? Is there anything similar to the English expressions "take care", "best wishes", "all the best" or do you just say "Měj se hezky"?
If you're late in replying to an (informal) letter and want to say "Sorry for the delay (in replying)"/"Sorry for the hold-up", can you say "Zpoždění mě mrzí"?
Yes. It's possible, but not very common. Other possibilities: Promiň/te mi mou pozdní odpověď, ... (pes mi sežral poslední tužku) Promiň/te mi zpoždění (s odpovědí), ... (dlouho jsem nemohl najít dopisní papír) ... Je mi líto, že jsem Tě/Vás nechal tak dlouho čekat na odpověď, ale ... (moje babička si opařila palec)...